Driving mechanism for dynamos.



N0. 637,7". 1 -Patented Nov. 2|, I899. J. L. CREVELING.

DRIVINGM ECHANISM FOR DYNAMOS.

' (Afiqlication filed Sept. 10, 1898.)

(No Model.)

UNITED STATES JOHN L. CREVELING,

OF'NEVV YORK, N. Y.

DRIVING MECHANISM FOR DYNAMOS.

SPECIFICATION forming part of Letters Patent. N 0. 637,71 1, dated November 21, 1899.

Application filed September 10, 1898- Serial No. 690,653. (No model.)

To aZZ whom it may concern.-

Be it known that 1, JOHN L. CREVELING, of New York, in the county of New York, State of New York, have invented Improvements in Driving Mechanism for Dynamos, of which the following is a complete specification, reference being bad to the accompanying draw ings.

The object of my invention is to produce improved means for driving a dynamo carried upon a car-truck by power taken from the car-axle through the employment of a gear connect-ion.

It is desirable in apparatus of the class to which my invention belongs to simplify the mechanism as much as possible in order to facilitate the change of parts or repairs.

Heretofore difficulty has been experienced in gearing the armature-shaft of a dynamo directly to a car-axle, because of the relative movement of the car-truck upon its supporting-springs with respect to the axle, whereby variation of the distance between the axis of the armature-shaft'and that of the axle is occasioned. By my invention through the employment of simple mechanism, all parts of which are easily accessible, this difiiiculty is overcome.

In the accompanying drawings, Figure I is a top plan view of a car and dynamo connected therewith in position as upon the under side of a car-truck. Fig. II is a section on the line H II of Fig. I, with the addition of a Iportion of the car-truck omitted from Fig.

Referring to the figures on the drawings, 1 and 2 (see Fig. 11) indicate portions of the side pieces of a car-truck, 3 the axle, and 4 the wheels upon which the truck runs. To the axle between the wheels are secured a gear 5 and one or more spacing members 6 and 7. I prefer to employ two spacing members consisting of smooth pulleys or disks. The gear and spacing member or members may be independently secured in fixed positions upon the axle, or, as illustrated, they may be all mounted uponone split sleeve 8. The manner and means'of mounting the gear and spacing members'upon the axle is obviously a matter of mechanical expediency.

9 indicates a transverse support that is rigidly secured to the truck and which, as by knuckle and pintle-joints l0, pendulously supports links 11, that, as indicated at 12, are boltedtothe dynamo 13.

1-1 indicates the armature-shaft of the dynamo, whose axis is substantially in the same horizontal plane as the axis of the axle 3. The armature-shaft is provided with a fixed pinion 15, adapted to mesh with the gear 5, and with a spacing member 16, so disposed as to make peripheral contact against the face of the spacing members 6 and 7, respectively. The spacing members 6, 7, and 16, respec tively,'are so proportioned with respect to the gears 5 and 15 that the line of contact between the respective spacing members shall be in a plane tangential to the pitch-line of the gears, whereby the contact between the spacing members limits the engagement of the teeth of the gears to a required depth.

The spacing member 16 and the gear 15 may be made integral with the armature-shaft 14 or may be secured to it, as preferred.

As above suggested, one or more spacing members may be employed upon the axle and armature-shaft, respectively; but the employment of two upon each is obviously preferable, as affording means for preserving a true alinement of the armature-shaft in parallel relation to the axle.

17 indicates an arm bolted or'otherwise secured, as indicated at 18, to the dynamo and terminating in a collar or half-collar 19,which supports the armature-shaft 14 between the gear 15 and the adjacent spacing member 16.

Having in the employment of the spacing members upon the axle and armature-shaft, respectively, provided against excessive engagement between the gear 5 and gear 15, I provide, on the other hand, means for yieldingly urging those members into engagement. Such means may consist simply of a plunger 20, carried within a housing 21 and actuated by a spring 22, Whose tension is preferably controllable by means of an abutment;screw 23. The housing 21 is rigidly supported in its required proximity to the dynamo, as by a suitable bracket 24, rigidly fixed upon the truck. By means of the mechanism above described the pinion 15 may be constantly, but yieldingly, urged toward engagement with r I O 1 I prefer toemploy in connection with the j the gear 5, sothat through the rotation of the axle 3 motion may be imparted to. the armature-shaft 14;

' It will be apparent from the foregoing description that the dynamo may be swung back against thetension of the spring 22,. so

.as 'todisengagethe pinion 15 and gear 5;

'Through movement of the dynamo'thedis engagement ofthe gear and pinion may bev efiected by the thrust'offlthe gear in case, for

example, the armature should stick, as from overloading the dynamo or other causes.

The automaticdisengagement of the gear and pinionin the manner immediately above described maybe ,accomplished'by the employment of ordinary gear-teeth or it maybe promotedfby sharply-wedge-shaped teeth.

movabledynamo a spring-actuated latch uponthe bracket 24, carried inthe path of a catch :26, secured to the dynamo. the employment ofsuch mechanism provision is made for holding the'pinion'l5 out of engagfementwith the gear 5 when the dynamo is-fthrown back, in the manner already de-' scribed, by the thrust of the gear, Such au- I tomatic disengagement of the gear and pinion is most likely to beoccasioned by some; defective operation of the. mechanism, andit Through is therefore desirable that the defectijve'operation should beremedied before the gear. and pinion reengage. Otherwise the continur ous engagementof the gear and pinion if,

for instance, the armature-shaft should stick fast might injure or destroy the gear orpinion', or both. The employment of the latch upon; the bracket in. conj unction with the catch uponfthe dynamo may also be employed for'disengagin g the gear and pinion at any time when itis thought desirablenot to have the armaturerotating, asin the case of a breakdown, "for example.

The'sp'acing members 6, 7, and 16, respec tively, may be made of any suitable material, such as steel,oompressed paper, or a frame of wood or metal covered' with leatheror rawhide. Such details of construction, as wellas the precise. manner of movably hanging the dynamo upon the truck, may well be left to thesjudgment of a skilled mechanic,- and'I' merely specify such preferred form a of .em-

'bodiment of my invention-and details ofconstruction as recommend themselves to me at the present timelwithout the intention of limitin'g myself thereto. 1 i

Wha't I' claim"is' axle as of a car-truck, of a dynamo movably supported inproximity to the.axle,-means for urging the dynamo toward the axle, intermeshinggears upon the axle and armature- ,shaft, respectively, spacing members near the opposite extremitiesbf. the armature-shaft, and cooperating spacing members upon the axle,fsubstantially as set'forth. 7

2; The combina'tion with the Wheels and. axle; asof a car-truck,,of a dynamo movably supported in proximity to the axle, means for urging the dynamo toward the axle, a single pairof int'ermeshing, gears located, respectively,fu pen the axle and armature-shaft, and spacing members carried thereonjupon oppow site sides ofsaid gears, substantially gasset forthy 3. Thecombination with a car-truck and its 1. The 'combination with-the wheels and axle, of a dynamo pendulously supported from the car-truck, spacing inembersiupon the axle and opposite'endsof the armature-shaft, respectively, and gears connecting the axle and armature-shaft between said spacing, members, substantiallyas set forth. I p v 1 I 4;. :The combinationwithacar-truck and its axle, of a movable dynamo in operative relations to the axle, means for urging the dynamo into said operative relations, and, latch mechanism adapted automatically to receive,

and hold the dynamo out of such operative tially as set forth. v 3 .5. The combination with a car-truck audits relations, under conditions specified, sub'stanaxle,'of; a dynamo and its armatures'haft,

'movably supported in operative proximity to the axle,intermeshing gears upon the axlea-nd armature-shaft, respectively, spacing members also-secured upon the'axle and arma-' tum-shaft,respectively, and an arm-upon the dynamo provided with a bearing intermediate the gear .and the spacing members, substan tiallyassetforth.- V I In testimony of all which'I have hereunto subscribed my name.

g J OHN'L. CREVELING.

; Witnesses:;' '7

.G. DARWIN, ELMER E. ALLBEE.'

ICQ 

